Abstract
A WIDELY used form of microwave attenuator consists of a length of rectangular waveguide, normally supporting the propagation of the H01 mode, and containing a dielectric vane which can be moved across the guide with its plane lying always parallel to the planes containing the narrow walls of the guide. A uniform resistive film is applied to one face of the vane, and negligible attenuation is obtained when this face lies close to a narrow wall. The attenuation increases as the vane is moved towards the centre of the waveguide1,2. The behaviour of the device has been studied for some time in this laboratory.
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References
Montgomery, C. G., (ed.), Technique of Microwave Measurements (McGraw-Hill, 1947).
Walliker, D. A. J., Proc. Inst. Elect. Eng., 109 B, Suppl. 23, 791 (1962).
Southworth, G. C., Principles and Applications of Waveguide Transmission (Van Nostrand, 1950).
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WALLIKER, D. Resistive Thin Films in Rectangular Waveguide. Nature 212, 186–187 (1966). https://doi.org/10.1038/212186a0
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DOI: https://doi.org/10.1038/212186a0
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